BIGTOP-3491. Add Ubuntu 20.04 support to the Bigtop toolchain. (#728)

diff --git a/bigtop_toolchain/bin/puppetize.sh b/bigtop_toolchain/bin/puppetize.sh
index e13fde0..358dadc 100755
--- a/bigtop_toolchain/bin/puppetize.sh
+++ b/bigtop_toolchain/bin/puppetize.sh
@@ -34,7 +34,7 @@
         apt-get update
         apt-get -y install wget curl sudo unzip puppet software-properties-common puppet-module-puppetlabs-apt puppet-module-puppetlabs-stdlib
         ;;
-    ubuntu-18.04)
+    ubuntu-18.04|ubuntu-20.04)
         apt-get update
         apt-get -y install wget curl sudo unzip puppet software-properties-common puppet-module-puppetlabs-apt puppet-module-puppetlabs-stdlib systemd-sysv
         ;;
diff --git a/bigtop_toolchain/manifests/packages.pp b/bigtop_toolchain/manifests/packages.pp
index b0bbb59..dd896dd 100644
--- a/bigtop_toolchain/manifests/packages.pp
+++ b/bigtop_toolchain/manifests/packages.pp
@@ -204,7 +204,6 @@
         "bison",
         "flex",
         "python-dev",
-        "python-pip",
         "libffi-dev"
       ]
       file { '/etc/apt/apt.conf.d/01retries':